At different times the Future Crew has stated this release was their 1st and their 2nd on PC, and that it came out in 1989. However, the YO.EXE binary conflicts with this year as it is compressed with a tool that wasn't released until 1990. This is Future Crew's second PC release, and it came out in 1990.

$ file YO.EXE

YO.EXE: MS-DOS executable, MZ for MS-DOS, LZEXE v0.91 compressed

A hex dump of the decompressed binary also reveals:

YO! by The Future Crew in 1990.

This demo is the second one the FC has produced for PC and it is (hopefully) to everyone's surprise better than the previous one!

FC-DEMO II (YO!) V0.9 - PROTOTYPE - DO NOT SPREAD!

The Second Future Crew Demo